Pace HIS 241 - Framework for Systems Analysis and Design (48 pages)

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Framework for Systems Analysis and Design



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Framework for Systems Analysis and Design

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Pages:
48
School:
Pace University
Course:
His 241 - Modern China
Modern China Documents
Unformatted text preview:

Chapter 1 The Context of Systems Analysis and Design Methods McGraw Hill Irwin Copyright 2007 by The McGraw Hill Companies Inc All Objectives 1 2 Define information system and name seven types of information system applications Identify different types of stakeholders who use or develop information systems and give examples of each Define the unique role of systems analysts in the development of information systems Identify those skills needed to successfully function as an information system analyst Describe current business drivers that influence information systems development Describe current technology drivers that influence information systems development Briefly describe a simple process for developing information systems 1 3 A Framework for Systems Analysis and Design A system is a group of interrelated components that function together to achieve a desired result An information system IS is an arrangement of people data processes and information technology that interact to collect process store and provide as output the information needed to support an organization Information technology is a contemporary term that describes the combination of computer technology hardware and software with telecommunications technology data image and voice networks 1 4 Types of Information Systems A transaction processing system TPS is an information system that captures and processes data about business transactions A management information system MIS is an information system that provides for managementoriented reporting based on transaction processing and operations of the organization A decision support system DSS is an information system that either helps to identify decision making opportunities or provides information to help make decisions 1 5 Types of Information Systems cont An expert system is an information system that captures the expertise of workers and then simulates that expertise to the benefit of non experts A communications and collaboration system is an information system that enables more effective communications between workers partners customers and suppliers to enhance their ability to collaborate An office automation system is an information system that supports the wide range of business office activities that provide for improved work flow between workers 1 6 Stakeholders Players in the Systems Game A stakeholder is any person who has an interest in an existing or proposed information system Stakeholders can be technical or nontechnical workers They may also include both internal and external workers Information workers are those workers whose jobs involve the creation collection processing distribution and use of information 1 7 Knowledge workers are a subset of information workers whose responsibilities are based on a specialized body of knowledge Stakeholders Perspectives on an Information System 1 8 System Owners System owners an information system s sponsor and executive advocate usually responsible for funding the project of developing operating and maintaining the information system 1 9 System Users System users a customer who will use or is affected by an information system on a regular basis capturing validating entering responding to storing and exchanging data and information 1 10 Internal System Users Clerical and service workers Technical and professional staff Supervisors middle managers and executive managers 1 11 External System Users Customers Suppliers Partners Employees Remote users users who are not physically located on the premises but who still requires access to information systems Mobile users users whose location is constantly changing but who requires access to information systems from any location 1 12 System Designers and System Builders System designer a technical specialist who translates system users business requirements and constraints into technical solution She or he designs the computer databases inputs outputs screens networks and software that will meet the system users requirements System builders a technical specialist who constructs information systems and components based on the design specifications generated by the system designers 1 13 Systems Analysts Systems analyst a specialist who studies the problems and needs of an organization to determine how people data processes and information technology can best accomplish improvements for the business A programmer analyst or analyst programmer includes the responsibilities of both the computer programmer and the systems analyst A business analyst focuses on only the nontechnical aspects of systems analysis and design 1 14 The Systems Analyst as a Problem Solver By Problems that need solving we mean Problems either real or anticipated that require corrective action Opportunities to improve a situation despite the absence of complaints Directives to change a situation regardless of whether anyone has complained about the current situation 1 15 Where Do Systems Analysts Work 1 16 Skills Needed by the Systems Analyst Working knowledge of information technology Computer programming experience and expertise General business knowledge General problem solving skills Good interpersonal communication skills Good interpersonal relations skills Flexibility and adaptability Character and ethics 1 17 The Systems Analyst as a Facilitator 1 18 The Ten Commandments of Computer Ethics 1 Thou shalt not use a computer to harm other people 2 Thou shalt not interfere with other people s computer work 3 Thou shalt not snoop around in other people s computer files 4 Thou shalt not use a computer to steal 5 Thou shalt not use a computer to bear false witness 6 Thou shalt not copy or use proprietary software for which you have not paid 7 Thou shalt not use other people s computer resources without authorization or proper compensation 8 Thou shalt not appropriate other people s intellectual output 9 Thou shalt think about the social consequences of the program you are writing or the system you are designing 1 19 10 Thou shalt always use a computer in ways that insure consideration and respect for your fellow human Source Computer Ethics Institute Other Stakeholders External Service Provider ESP a systems analyst system designer or system builder who sells his or her expertise and experience to other businesses to help those businesses purchase develop or integrate their information systems solutions may be affiliated with a consulting or services organization 1 20 Project Manager an


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